Thank you Cortex,
I will try n64 to see if the 4 players are working ‘out of the box’, as you say.
hope it works!

Oh and I tried what’s written on the link, but things simply don’t work, and I have no clue about the reason, sometimes the 1st joy controls both players, sometimes, i lose control both from keyboard (who is always player 1 on my config) and the joys, and need to kill the emu via ssh. And some other times just key and 1st joy work on default 2 players settings.